Tungsten-lamp shock-absorber and adapter.



J. H. DALE. TUNGSTEN LAMP SHOCK ABSORBER AND ADAPTER.

I 7 APPLICATION Til-ED EAR. 29, 1910.,

Patentd Dec. 27, 1910'."

UNITED STATES PATENT OFFICE.

JOHN H. DALE, or NEW YORK, at. Y.

TUNGSTEN-LAMP SHOCK-ABSORBER AND ADAPTER.

To all whom may concern:

Be it known that I, JOHN H DALE, a citizen of the United States, residing at the city of New York, in the borough of Manhattan and'State of New York, have invented certain new and useful Improvements in Tungsten-Lamp Shock-Absorbers and Adapters, of which the following is a full, clear, and exact description.

This invention relates to lamp shock-absorbers "and adapters, particularly for incandescent lamps wherein a tungsten filament is employed. As is well known, these filaments are extremely fragile; and are so delicate, in fact, that after a tungsten lamp has been used for a' short while, the same can be removed from its socket only by the exercise of great care without rupturing the filament thereof. I have-provided a novel means for obviating almost entirely the danger of breaking the filament in a tungsten lamp by reason of shocks to which such a lamp is usually subjected in ordinary use.

My invention comprises two features 'which I regard as of particular importance:

One, the provision of a resilient cushionbetween the elementsof a universal joint; and the other,-n1eans of suspending such elements from a bracket which may be disposed at any angle; this last feature permitting a lamp supported-by my device to be carried from asupporting surface which may be horizontal, vertical or at an angle.

Other. features of my invention will be hereinafter set forth and more'particularly pointed out in the appended claims.

Referring now to the drawings, which form a part hereof, and in which like characters designate like parts-throughout the several views: Figure l'is'a side elevation of 'iny shock-absorber anld' adapter with lamp fittings secured thereto, the whole depending from a vertically disposed bracket. Fig. 2 is an enlarged detail of the shockabsorber and adapter proper. Fig. 3 is a longitudinal section through thesame, showing the application of the adapter to a wall bracket,.the stud ofavhich extends downwardlv substantially at Referring to. Fig. 1, the stem of the brackethas therein been designated 1, the adapter element 2 being secured to the end thereof in any proper manner, as by a thre'adml engageu'ient. The element is trans-- versely apertur'alat 25 for the reception of Specification of Lettersiatent. PatentedDec. 27, 191 0.

Application filed March 29, 1910. Serial No. 552,233.

the inwardly bent ends 4 of a link 5; which I link is preferably attached to the, adapter by snapping the said ends in from opposite sides of the aperture 3. Link 5 is in linked engagement with a corresponding lower link 6, the provision of such links in connection with devices for supporting incandescent lamps being of course common. It will be observed, however, that I have secured astud or pin 7, preferably by screwing the same into a threaded recess 8, in the lowermost portion of the link 5; thispin extending thence upwardly in a'linem'ent with the said links apart. I also prefer to provide a corresponding spring 11, of preferably but few turns, which is disposed between the.

head 9 and the upper surface ofv link 6.

This construction floats link 6, so to speak, so that the same is resiliently cushioned against shock, while being at the same time roperly supported from link 5. The pin l is adapted to move freely through the aperture 12 provided in the upper portion oflink 6. Links 5 and 6 are preferably substantially identical in general contour, and the bent ends 13 at the bottom of link 6 are correspondingly engaged with apivotally mounted element 14 which is provided with a threaded stud 15. This stud is adapted to be screwed in the usual manner 1nto a threaded recess in the upper port-ion of a lamp socket 16. As viewed in Fig. 1, the lamp may be freely oscillated in a plane normal to that of the sheet of drawing, such plane passing through the axis of bracket stem 1. It is evident also that by reason of the pivotal connection between the links, the lamp may be axially rotated for some distance in either direction. The members 2 and 14, links 5 and 6, pin 7, and cushioning members 10 and 1.1, hence provide a universal joint, which while permitting movement in any direction desired, nevertheless impunity, and the said piece rotated to effect engagement and disengagement of the switch parts in the socket without running 7 the liability of rupturing .the tungsten filameat, It is evident also that by reason of the pivotal connection of member 2 with link 5, said member may'be, swung around to adapt the same for enga ement with a supporting stud which may disposed at so stantially any angle in a vertical plane; that in Fig. 2 bang at substantially with the horizontal. The bracket stem in Fig.2 has been designated 1.

described my nvention, what I 1. A tungsten lamp shock-absorber and adapter, com rising elements pivotally connected to eac other to provide a-universal joint, one of said elements afi'ording support for the remaining parts of the device, and such element being pivotally connected to the adjacent member andbeing further provided with means for securing said element .in place upon a bracket, the universal joint aforesaid comprising elements cushioned from each other.

2. A tungsten lamp ShOCk-QlOSOIbQI JIHCl .adapter comprising a. pair of bent members,

one of whiclris linked through theother, a

pivotal pin secured'to one ofgsaid elements,

i the other of said elements slidably engaging said pin, and a'resilient device dlsposed between'the opposing surfacps of said linked elements 3. A tungsten lamp shock-absorber and adapter comprising a link-shaped member carrying a pin in substantial alinement with the sides thereof, a second link-shaped member apertured for the reception of said pin,-

and a plurality of resilient devices disposed adjacent the said pin, one of said devices being interposed between the normally contacting surfaces of said link members, and the other of said devices being disposed between the upper surface of one of "said members, and an abutment carried by said pin.

4. A tungsten lamp shock-absorber and adapter comprising a link-shaped member carrying a pin in substantial alinement with the sides thereof, a second linleshaped member apertured for the reception of said pin, and a plurality of resilient devices disposed adjacent the said pin, one of said devices being interposed between the normally contacting surfaces of said link members, and the other of said devices being disposed between the upper surface of one of said mem--' bers, an abutment carried by said pin, and a air of members, one of which is recessed and threaded for the reception of a threaded stud, and the other of which is provided with oscillation of each of said members in a plane passing through the axis of the pivot aforesaid.

6. A device of the class describedcomprising linked members, a pivot connecting said members, springs disposed u on said pivot upon the respective sides 0 one of said linked members, and an element pivotally connected to one of said'members and cooperating with said linked members -to form a universal joint.

In witness whereof, I subscribe my signature, in the presence of two witnesses.

. JOHN H. DALE.

' lVitnesses:

\V ALTER. I. HESS, C. P. RonN. 

